All,
Some comments.
1. Yes, it looks like Fusion is not importing correctly. As shown in another screen capture the pyramid is OK when opened in Inventor.
2. I have updated some constraint values as per the original thread and will repost on the community. Downlaod if you need a more accurate model.
3. An updated STEP file is attached to this thread.
http://www.chiefdelphi.com/forums/sh...d.php?t=110680
4. If you are using STEP in a previous version of Inventor, select all the subassemblies in the browser. Right-click on the selection, and click Grounded.